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A206239 Subsequence A005318(t_n), where t_n is the n-th triangular number (A000217). 1
0, 1, 4, 24, 309, 8807, 530356, 65679652, 16512273616, 8370804628178, 8525389679187197, 17408681737224080093, 71192609533782031405771, 582711051458083440858730497, 9542765396943645975520145941300, 312620974584432225019935558843189172, 20485270547000003746699189223065768145956 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

These are the repeated terms in A205744.

LINKS

Table of n, a(n) for n=1..17.

R. K. Guy, Sets of integers whose subsets have distinct sums, pp. 141-154 of Theory and practice of combinatorics. Ed. A. Rosa, G. Sabidussi and J. Turgeon. Annals of Discrete Mathematics, 12. North-Holland 1982. See Table 1.

CROSSREFS

Cf. A005318, A205744, A096858.

Sequence in context: A052727 A219118 A005756 * A196687 A185457 A024250

Adjacent sequences:  A206236 A206237 A206238 * A206240 A206241 A206242

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 09 2012

STATUS

approved

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Last modified November 18 21:51 EST 2017. Contains 294912 sequences.