A379974 A373711(n) is equal to the a(n)-th A379973(n)-gonal number.

0, 1, 4, 15, 7, 9, 22, 19, 55, 70, 45, 119, 41, 73, 34, 181, 110, 115, 77, 361, 86, 631, 1009, 1513, 1683, 2161, 1191, 2971, 694, 3961, 604, 5149, 6553, 8191, 10081, 12241, 14689, 17443, 20521, 9000, 23941, 27721, 4970, 31879, 36433, 41401

Offset: 1

Author

Pontus von Brömssen, Jan 08 2025

Keywords

• nonn
• more

Comments

Indices to polygonal numbers are chosen so that the first k-gonal number is 1 (and the zeroth is 0).

Crossrefs

Cf. A057145, A373711, A379973, A379975.

Formula

A057145(A379973(n),a(n)) = A373711(n).