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 A096812 Forwards row convergent of triangle A096811, in which A096811(n,k) equals the k-th term of the convolution of the two prior rows indexed by (n-k) and (k-2). 4
 1, 1, 1, 2, 4, 8, 16, 34, 72, 156, 336, 746, 1652, 3696, 8330, 18816, 42904, 98166, 225148, 518386, 1199966, 2778270, 6472492, 15097226, 35311946, 82744656, 194406728, 457526278, 1078889548, 2549790238, 6034719500, 14305107700, 33965903292, 80747360636, 192219095518, 458252713872, 1093494859572, 2613290156486, 6251109118574, 14970041423150 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Backwards row convergent of A096811 is A096813. LINKS Paul D. Hanna, Table of n, a(n) for n = 0..50 FORMULA a(0)=a(1)=1; for n>1, a(n) = Sum_{k=0..n-2} A096811(n-2, n-k-2)*a(k+1). PROG (PARI) {A096811(n, k)=if(n

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Last modified November 27 18:22 EST 2020. Contains 338683 sequences. (Running on oeis4.)