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 A127967 A right-skewed Pascal triangle, with interspersed 1's on main diagonal. 3
 1, 1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 0, 3, 0, 1, 1, 0, 4, 0, 3, 1, 1, 0, 5, 0, 6, 0, 1, 1, 0, 6, 0, 10, 0, 4, 1, 1, 0, 7, 0, 15, 0, 10, 0, 1, 1, 0, 8, 0, 21, 0, 20, 0, 5, 1, 1, 0, 9, 0, 28 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,9 COMMENTS Linked to Fibonacci numbers by row sums A127968. Inverse A127969 is linked to Genocchi numbers by its first column. LINKS FORMULA Column k is generated by x^(-2)*(x*(1-x)^(-1/2))^(k+2), where non-integer values are set to 0; or, column k has g.f. if(mod(k,2)=0,x^k/(1-x)^(1+k/2),x^k) EXAMPLE Triangle begins 1, 1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 0, 3, 0, 1, 1, 0, 4, 0, 3, 1, 1, 0, 5, 0, 6, 0, 1, 1, 0, 6, 0, 10, 0, 4, 1, 1, 0, 7, 0, 15, 0, 10, 0, 1, 1, 0, 8, 0, 21, 0, 20, 0, 5, 1, 1, 0, 9, 0, 28, 0, 35, 0, 15, 0, 1, 1, 0, 10, 0, 36, 0, 56, 0, 35, 0, 6, 1, 1, 0, 11, 0, 45, 0, 84, 0, 70, 0, 21, 0, 1 CROSSREFS Sequence in context: A180984 A051628 A163540 * A147602 A114206 A073202 Adjacent sequences:  A127964 A127965 A127966 * A127968 A127969 A127970 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Feb 09 2007 STATUS approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)