1,1
P. De Geest, World!Of Numbers
E.g. 22 = 4 + 5 + 6 + 7; 242 = 44 + 55 + 66 + 77.
Cf. A002113.
Sequence in context: A037268 A091783 A159649 this_sequence A126903 A035706 A041930
Adjacent sequences: A046496 A046497 A046498 this_sequence A046500 A046501 A046502
nonn
Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1998.
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