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Search: id:A035071
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A035071 a(n) is root of square starting with digit 4: first term of runs. +0
3
2, 7, 20, 64, 200, 633, 2000, 6325, 20000, 63246, 200000, 632456, 2000000, 6324556, 20000000, 63245554, 200000000, 632455533, 2000000000, 6324555321, 20000000000, 63245553204, 200000000000, 632455532034, 2000000000000 (list; graph; listen)
OFFSET

0,1
FORMULA

ceiling(sqrt((4*10^n))

CROSSREFS

Cf. A067474 (squares), A035076 (2..9).

Sequence in context: A015518 A083379 A000935 this_sequence A055891 A122877 A000150

Adjacent sequences: A035068 A035069 A035070 this_sequence A035072 A035073 A035074

KEYWORD

nonn,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 1998.

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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