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A028320
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Distinct even elements in the 5-Pascal triangle A028313.
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3
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6, 12, 8, 38, 10, 36, 46, 130, 204, 378, 462, 14, 82, 582, 840, 96, 1422, 1680, 16, 1210, 3102, 562, 6204, 18, 144, 5148, 8866, 162, 2912, 14014, 23166, 20, 1176, 4740, 14028, 31668, 55848, 78078, 87230, 22, 222, 5916, 18768, 45696, 87516, 133926
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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DeleteDuplicates[Table[If[n<2, 1, Binomial[n, k] +3*Binomial[n-2, k-1]], {n, 0, 30}, {k, 0, n}]//Flatten]//Select[EvenQ] (* G. C. Greubel, Jul 13 2024 *)
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PROG
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(SageMath)
def A028323(n, k): return 1 if n<2 else binomial(n, k) + 3*binomial(n-2, k-1)
b=flatten([[A028323(n, k) for k in range(n+1)] for n in range(31)])
def a(seq): # order preserving
nd = [] # no duplicates
[nd.append(i) for i in seq if not nd.count(i) and i%2==0]
return nd
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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