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 A106585 Triangle read by rows: even-numbered rows of A106580. 1
 1, 1, 2, 2, 1, 2, 5, 7, 7, 1, 2, 5, 13, 22, 29, 29, 1, 2, 5, 13, 34, 65, 101, 130, 130, 1, 2, 5, 13, 34, 89, 185, 322, 481, 611, 611, 1, 2, 5, 13, 34, 89, 233, 514, 973, 1613, 2354, 2965, 2965, 1, 2, 5, 13, 34, 89, 233, 610, 1405, 2837, 5090, 8185, 11761, 14726, 14726, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS EXAMPLE 1; 1,2,2; 1,2,5,7,7; 1,2,5,13,22,29,29; ... MAPLE A106580 := proc(n, k) option remember ; if k =0 then 1 ; else A106580(n, k-1)+add(A106580(n-2*i, k-i), i=1..min(k, floor(n/2), n-k)) ; fi ; end: for n from 0 to 18 by 2 do for k from 0 to n do printf("%d, ", A106580(n, k)) ; od ; od ; - R. J. Mathar, Aug 10 2007 CROSSREFS Cf. A106580, A106595. Sequence in context: A183760 A125678 A091562 * A057227 A162663 A005007 Adjacent sequences:  A106582 A106583 A106584 * A106586 A106587 A106588 KEYWORD nonn,tabf,easy AUTHOR N. J. A. Sloane, May 30 2005 EXTENSIONS More terms from R. J. Mathar, Aug 10 2007 STATUS approved

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Last modified May 20 22:49 EDT 2013. Contains 225464 sequences.