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Search: id:A099962
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| 1, 1, 1, 1, 2, 3, 5, 13, 28, 64, 207, 578, 1685, 6518, 22361, 79319, 357180, 1453177, 6075215, 31216968, 146906126, 707344776, 4084254624, 21823224623, 118932148555, 762346849634, 4559139897594, 27742486678915, 195472113041924
(list; graph; listen)
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OFFSET
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0,5
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MAPLE
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with(linalg):rev:=proc(a) local n, p; n:=vectdim(a): p:=i->a[n+1-i]: vector(n, p) end: ps:=proc(a) local n, q; n:=vectdim(a): q:=i->sum(a[j], j=1..i): vector(n, q) end: pss:=proc(a) local n, q; n:=vectdim(a): q:=proc(i) if i<=n then sum(a[j], j=1..i) else sum(a[j], j=1..n) fi end: vector(n+1, q) end: R[0]:=vector(1, 1): for n from 1 to 35 do if n mod 3 = 0 or n mod 3 = 1 then R[n]:=ps(rev(R[n-1])) else R[n]:=pss(rev(R[n-1])) fi od: seq(R[n][1], n=0..35); (Deutsch)
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CROSSREFS
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Cf. A099961.
Sequence in context: A087898 A072537 A089477 this_sequence A072536 A087592 A038879
Adjacent sequences: A099959 A099960 A099961 this_sequence A099963 A099964 A099965
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 13 2004, following a suggestion made by Douglas G. Rogers, Mar 10, 2003
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 16 2004
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