Square pyramidal numbers sp(n) with a zeroless decimal representation such that (product of decimal digits of sp(n)) / n is an integer.
A380070
Square pyramidal numbers sp(n) with a zeroless decimal representation such that (product of decimal digits of sp(n)) / n is an integer.
Terms
- a(0) =1a(1) =55a(2) =385a(3) =5525a(4) =7714a(5) =9455a(6) =31395a(7) =116795a(8) =3382596a(9) =6597495a(10) =14352975a(11) =38381931a(12) =63866976a(13) =67938794a(14) =151289984a(15) =726434136a(16) =2733212496a(17) =2769972525a(18) =6477521344a(19) =13765386816a(20) =16149163995a(21) =17585156875a(22) =19598599944a(23) =78466472175a(24) =129166736265a(25) =371557934784a(26) =597944938275a(27) =982218617856
External references
- oeis: A380070