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A048201
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Triangular array T read by rows: T(i,j)=b(i+1)-b(i+1-j); j=1,2,...,i; i=1,2,3,...; b=A004978.
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10
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1, 2, 3, 4, 6, 7, 5, 9, 11, 12, 8, 13, 17, 19, 20, 10, 18, 23, 27, 29, 30, 14, 24, 32, 37, 41, 43, 44, 15, 29, 39, 47, 52, 56, 58, 59, 16, 31, 45, 55, 63, 68, 72, 74, 75, 21, 37, 52, 66, 76, 84, 89, 93, 95, 96, 22, 43, 59, 74, 88, 98, 106, 111
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..63.
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FORMULA
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T(n, 1)=least number not in any preceding row and T(n, k)=T(n, 1)+T(n-1, 1)+...+T(n-k+1, 1) for k >= 2.
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EXAMPLE
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Rows: {1}, {2,3},{4,6,7}, ...
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CROSSREFS
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T(n, 1)=c(n), where c=A002048.
T(n, n)=d(n), where d=A002049.
Sequence in context: A354901 A026236 A238862 * A186004 A056534 A297933
Adjacent sequences: A048198 A048199 A048200 * A048202 A048203 A048204
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KEYWORD
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nonn,tabl
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AUTHOR
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Clark Kimberling
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STATUS
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approved
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