A167222 Irregular triangle read by rows: T(n,k) = n^3 - k^2 with 0 <= k <= A077121(n).

0, 1, 0, 8, 7, 4, 27, 26, 23, 18, 11, 2, 64, 63, 60, 55, 48, 39, 28, 15, 0, 125, 124, 121, 116, 109, 100, 89, 76, 61, 44, 25, 4, 216, 215, 212, 207, 200, 191, 180, 167, 152, 135, 116, 95, 72, 47, 20, 343, 342, 339, 334, 327, 318, 307, 294, 279, 262, 243, 222, 199, 174

Offset: 0

Author

Reinhard Zumkeller, Oct 31 2009

Keywords

• nonn
• tabf
• look

Examples

			Triangle begins:
  0;
  1, 0;
  8, 7, 4;
  27, 26, 23, 18, 11, 2;
  64, 63, 60, 55, 48, 39, 28, 15, 0;
  125, 124, 121, 116, 109, 100, 89, 76, 61, 44, 25, 4;
  216, 215, 212, 207, 200, 191, 180, 167, 152, 135, 116, 95, 72, 47, 20;
  ...
		

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..9999

Crossrefs

Cf. A000290, A000578, A077121.

For primes see A167224.

Programs

PARI

row(n) = my(c=n^3); vector(1+sqrtint(c), i, c-(i-1)^2); \\ Michel Marcus, May 28 2024