OFFSET
1,4
COMMENTS
Coefficients for Pontryagin classes of projective spaces. See p. 3 of the Wilson link. Aerated to become a lower triangular matrix with alternating zeros on the diagonal, this matrix appparently becomes the reverse, or mirror, of A117178. - Tom Copeland, May 30 2017
LINKS
Reinhard Zumkeller, Rows n = 1..200 of triangle, flattened
Jon Maiga, Computer-generated formulas for A014462, Sequence Machine.
D. Wilson, Genera: From cobordism to K-theory, Jul 2016.
EXAMPLE
Array begins:
1;
1;
1, 3;
1, 4;
1, 5, 10;
1, 6, 15;
1, 7, 21, 35;
1, 8, 28, 56;
1, 9, 36, 84, 126;
1, 10, 45, 120, 210;
1, 11, 55, 165, 330, 462;
PROG
(Haskell)
a014462 n k = a014462_tabf !! (n-1) !! (k-1)
a014462_row n = a014462_tabf !! (n-1)
a014462_tabf = map reverse a014413_tabf
-- Reinhard Zumkeller, Dec 24 2015
CROSSREFS
KEYWORD
tabf,nonn,easy
AUTHOR
EXTENSIONS
More terms from James A. Sellers
STATUS
approved