A344377 - OEIS

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A344377

Numbers that are both 11-gonal numbers (A051682) and 11-gonal pyramidal numbers (A007586).

2

0, 1, 23725, 1519937678700, 7248070597636

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

Intersection of A051682 and A007586.

LINKS

Table of n, a(n) for n=1..5.

Numberphile, Cannon Ball Numbers.

PROG

(PARI) for(k=0, 1e5, if(ispolygonal(m=k*(k+1)*(3*k-2)/2, 11), print1(m", ")))

CROSSREFS

Cf. A007586, A027568, A051682, A344280, A344376.

Sequence in context: A223342 A179918 A168169 * A031649 A011254 A226002

Adjacent sequences: A344374 A344375 A344376 * A344378 A344379 A344380

KEYWORD

nonn,more

AUTHOR

Seiichi Manyama, May 17 2021

STATUS

approved