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Gerald H · (This post was last modified: 06-15-2017 01:58 PM by Gene.)

Sequence of even numbers without the squares, OEIS A157502

2, 6, 8, 10, 12, 14, 18, 20, 22, 24, 26, 28, 30, 32, 34, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 66, 68…..

For index N solve the equation

G = IP( SQRT( 2 * N ) + 0.5 ) ► R + 2 * N – RMDR( R , 2 )

for G.

For input

N = 1E10

The calculator returns

G = 20,000,141,420

Anyone recognize 141,42……?