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A077281
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Square root of sum of successive primes in n-th group in A077280.
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4
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OFFSET
| 1,1
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COMMENTS
| Partition of sequence of primes in groups such that sum of terms in each group is a square: {2-23}, {29-1021}, {1031-2179}, {2203-4051}, {4057-4153}, {4157-50377}, {50383-66643}, {66653-173647},{173651-2076913},{2076917-?},...; A077280(n) gives the number of terms in n-th group; A077281(n)^2 gives the sum of terms in n-th group; A077282(n) gives the first term in n-th group; A077283(n) gives the last term in n-th group.
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EXAMPLE
| a(1)=10 because sum of first nine primes 2+...+23=100=10^2; a(2)=283 because sum of next 163 successive primes 29+...+1021=80089=283^2.
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CROSSREFS
| Cf. A077280, A077282, A077283.
Sequence in context: A025035 A012243 A186270 * A049387 A024295 A159960
Adjacent sequences: A077278 A077279 A077280 * A077282 A077283 A077284
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KEYWORD
| nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Nov 02 2002
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EXTENSIONS
| a(9) from Zak Seidov (zakseidov(AT)yahoo.com), Sep 28 2011
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