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Search: id:A060076
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| 1, 30, 1211, 68060, 5162421, 510964090, 64108947631, 9954077496120, 1874917179220841, 421327494210872150, 111374995513203846051, 34217341079365673500180, 12091183195611248756287261
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OFFSET
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0,2
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COMMENT
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Also fourth diagonal of triangle A060058.
a(n) is n-fold iterated sum of squares with last upper summation index 4 and other upper summation indices j[k]+1, k=2,...,n. See Comments A060061 for the threefold iteration with last upper summation index n.
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FORMULA
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a(n)=A060074(n+3, 3)= A060058(3+n, n).
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CROSSREFS
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Sequence in context: A001821 A027488 A075187 this_sequence A002456 A107768 A048536
Adjacent sequences: A060073 A060074 A060075 this_sequence A060077 A060078 A060079
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Mar 16 2001
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